/**
 * Created with IntelliJ IDEA.
 * Description:
 * User: syyyy
 * Date: 2025-07-03
 * Time: 12:18
 */
public class Test {
    public static void main(String[] args) {
        double num=1.3;
        double sum=num*num;
        System.out.println(sum);
    }
    public static void main1(String[] args) {
        Dog dog=new Dog();
        System.out.println(dog.name);
        System.out.println(dog);
        System.out.println(dog.toString());//和上面那个是一样的
    }

}
